Integers

1
Integers
Add / Subtract Integers
Double Negatives
Multiply ve / -ve Integers
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Divide by ve or -ve Integers
2
Starter Questions
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3
Integers
Addition Subtraction
Learning Intention
Success Criteria

1. To be able to do add and subtract both positive
   and negative integers.

1. To understand how to add positive and
negative numbers using the thermometer as an aid.
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4
Integers
Addition Subtraction
1 3
4
4 - 5
-1
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-3 5
2
-1 - 2
-3
5
Integers
Now try Exercise 3 Ch2 (page 14)
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6
Starter Questions
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7
Integers
Addition Subtraction
Learning Intention
Success Criteria

1. To understand the double negative for integers.

1. To explain the double negative for
integers.
2. To simplify and solve problems using
the double negative property.
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8
Integers
Addition Subtraction
Double Negative
1 - (- 2)
3
1 2
- 4 (- 5)
1
- 4 5
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-3 - (- 5)
2
- 3 5
-1 - (- 10)
9
-1 10
9
Integers
Addition Subtraction
Now try Exercise 4 Ch2 (page 15)
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10
Starter Questions
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11
Integers
Multiplication Division
Learning Intention
Success Criteria
1. Understand how to multiply positive and
negative integers.
1. Explain how to multiply positive and
negative integers.
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12
Integers
Multiplication Division
Multiplying Integers
1 x (-2) (-2)
(-2) 1 -2
(-4) x 5 -20
(- 20) 5 -4
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(-3) x 3 -9
15 (-5) -3
5 x (-8) -40
40 (-8) -5
13
Integers
Multiplication Division
Now try Exercise 5 Ch2 (page 17) Q1 Q6
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14
Starter Questions
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15
Integers
Multiplication Division
Learning Intention
Success Criteria
1. Understand the double negative for
multiplying and dividing negative numbers.
1. To explain the double negative for
multiplying and division.
2. Use double negative to solve problems.
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16
Integers
Multiplication Division
(-2) x (-1) 2
(-2) (-1) 2
(-4) x (-5) 20
(- 20) (-5) 4
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(-3) x (-3) 9
(-9) (-3) 3
(-5) x (-8) 40
(-40) (-8) 5
17
Integers
1 x (-2) (-2)
(-2) 1 -2
(- 20) 5 -4
(-4) x 5 -20
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15 (-5) -3
(-3) x 3 -9
40 (-8) -5
5 x (-8) -40
18
Integers
Multiplication Division
Now try Exercise 5 Ch2 (page 18) Q7 Q10
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